Number of arrangements of 8 nonzero numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero.
A188254
Number of arrangements of 8 nonzero numbers x(i) in -n..n with the sum of x(i)*x(i+1) equal to zero.
Terms
- a(0) =0a(1) =4132a(2) =51196a(3) =368588a(4) =1399640a(5) =4875112a(6) =11953848a(7) =28779900a(8) =58731504a(9) =116157280a(10) =200181920a(11) =362242468a(12) =569517636
External references
- oeis: A188254